Jeffrey is making a model of tungsten for his chemistry class. he has foam balls for the protons, neutrons, and electrons. he has added 21 electrons to his model so far. how many more electrons does he need to add to complete his neutral atom of tungsten? a. 1 b. 22 c. 31 d. 53

Astable electron arrangement for an atom is one that does not easily change. how is this arrangement arrived at? a. valence electrons are transferred or shared to create a full outer shell of electrons. b. valence electrons are discarded into space to create a full outer shell of electrons. c. protons (positive charge) pair with valence electrons (negative charge) to create a strong bond. d. outer shells with valence electrons are transferred or shared.

Which elements are found in glucose, the product of photosynthesis? a. carbon, hydrogen, and oxygen b. carbon and hydrogen c. carbon, nitrogen, and oxygen d. hydrogen, nitrogen, and carbon

How many atomic mass units are equal to 1.672×10−24 g of protons?